tsconfig.json

{
  "compilerOptions": {
    /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "allowSyntheticDefaultImports": true,
    /* Force the strict mode */
    "alwaysStrict": true,
    /* For absolute imports */
    "baseUrl": "",
    /* Generates corresponding '.d.ts' file. */
    "declaration": true,
    /* Add sourcemaps for declarations */
    "declarationMap": true,
    /* Most important thing: babel will handle the actual file generation */
    "emitDeclarationOnly": true,
    /* Specify library files to be included in the compilation:  */
    "lib": ["esnext", "es5", "es6"],
    /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "module": "ESNext",
    "moduleResolution": "node",
    /* Do not emit outputs. Babel will emeit and typescript will do the tooling */
    "noEmit": false,
    /* Report errors for fallthrough cases in switch statement. */
    "noFallthroughCasesInSwitch": true,
    /* Report error when not all code paths in function return a value. */
    "noImplicitReturns": true,
    /* Raise error on 'this' expressions with an implied 'any' type. */
    "noImplicitThis": true,
    /* Report errors on unused locals. */
    "noUnusedLocals": true,
    /* Report errors on unused parameters. */
    "noUnusedParameters": true,
    /* Where the declarations will be written */
    "outDir": "dist",
    "skipDefaultLibCheck": true,
    /* Our custom folder for types */
    "typeRoots": ["bolt_types", "node_modules/@types"],
    /* Because we build a library */
    "skipLibCheck": true,
    /* Generates corresponding '.map' file. */
    "sourceMap": true,
    /* You don't want to be loose! */
    "strict": true,
    /* Enable strict checking of function types. */
    "strictFunctionTypes": true,
    /* Enable strict null checks. You have to add "| null" in your type when needed. */
    "strictNullChecks": true,
    /* 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
    "target": "ESNEXT"
  },
  "include": ["./src/**/*", "bolt_types"],
  "exclude": ["./node_modules/**/*", "./lib/**/*"]
}